Wrong chainring?

[Sharky]

'lifting pin'

It just helps when changing from the little ring to the big ring. It should be flush on the outside and sticking out a few mm on the inside. If its not like this then would be worth turning to see the affect.

If it is sticking out on the frame side, then it is the right way round.

 

[ColinJ]

 

[silva]

I once had a recurring chain coming off problem. Whilst the chainring itself wasn't warped the bottom bracket axle was bent causing a quarter inch of run out, which not surprisingly threw the chain. I was astonished that a half inch diameter solid steel axle had bent somehow, as I wasn't exactly Eddie Merckx.

Hey it's EddY Merckx not Eddie Murphy!

 

[Chief Broom]

Morning folks ive decided to go to a bike shop to sort this problem, dont fancy ordering up another through the post which may or maybe not fit
When i gave Tredz the dimensions they gave me just the one option which i chose....i find this puzzling now as the the one they sent is part of a groupset it follows there would be multiple options which would fit.....
Anyhow the original still has some life in it which'll give me time to cadge a lift to the nearest bike shop

 

[Alex321]

Morning folks ive decided to go to a bike shop to sort this problem, dont fancy ordering up another through the post which may or maybe not fit
When i gave Tredz the dimensions they gave me just the one option which i chose....i find this puzzling now as the the one they sent is part of a groupset it follows there would be multiple options which would fit.....

Not for any given number of teeth. If you specified 42 teeth, then there would only be one option from any groupset - and TBH that is not one of the more common sizes for 2x - the large ring will rarely be less than 46T, while the small ring will never be more than 39T.

And of course, they will only have offered you what they have in stock, or can get within a few days.

Anyhow the original still has some life in it which'll give me time to cadge a lift to the nearest bike shop

Sounds like a plan.

 

[Chief Broom]

One last thought. The lifting pin that's visible are usually on the big ring of a double chainset and on the inside. That is, facing the frame.

Can you turn the ring round, so the lifting pin is on the inside.

Ok folks i hopes this post concludes the sorry tale of newbie ineptness!
The Sherlock award......

“When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth.”​

goes to Sharky as he spotted the chain ring is the wrong way round... This morning i tried this fix and whadyaknow it works! Ive had a spin around the block up and down the gears and alls well. Indoors with the bike inverted ive spun every which way and the chain is staying where it should. The only doubt i have left is the differance in chain ring teeth ie the original has plain simple teeth with no chamfers and the new one has...fingers crossed!
The Idiocy Award ...er..um..goes to me!

 

[Sharky]

Ok folks i hopes this post concludes the sorry tale of newbie ineptness!
The Sherlock award......

“When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth.”​

goes to Sharky as he spotted the chain ring is the wrong way round... This morning i tried this fix and whadyaknow it works! Ive had a spin around the block up and down the gears and alls well. Indoors with the bike inverted ive spun every which way and the chain is staying where it should. The only doubt i have left is the differance in chain ring teeth ie the original has plain simple teeth with no chamfers and the new one has...fingers crossed!
The Idiocy Award ...er..um..goes to me!

Well done